MBF-100 Bandpasser II
(AS-419)
Order Bandpasser II - $649
*
Six bands in one compact unit
* 100 watt ICAS rating
* SWR less than 1.25 across band
* Low insertion loss < .7 dB
* over 40 dB rejection of adjacent bands (excluding WARC)
* Hand tuned for maximum performance
* Custom labeling available
* Size 2.4H x 6.7W x 9.6D (inches)
* Weight 3 pounds
Information on installation and operation
The ShackLAN Bandpasser II contains six high performance bandpass filters in a single compact package and comes standard with filters for 160, 80, 40, 20, 15 and 10 meters. Filters for 160M thru 15M are 3-pole Chebyshev designs which provide over 40db rejection of adjacent bands (excluding WARC bands). Due to the narrow separation between 15M and 10M (25%), the 10M filter is a Cauer high pass design that provides deep notches on the 15M and 20M bands. These filters are rated at 100 watts. These filters are designed be used between your radio and amplifier or antenna. They low insertion loss (less than 0.6 db) and low SWR (less than 1.25:1) across an entire band. The filters can be selected via front panel pushbutton switches, via our ShackLAN system or remotely by applying +5 to 12 for each individual band to the rear panel control connector. The Bandpasser II may also be configured to accept Yaesu and Elecraft band data for automatic filter selection. Bypass mode is automatically selected when no power is applied or no filters are selected. As is standard in all ShackLAN devices, the unit is protected against reverse polarity and over-voltage.
All filters in the Bandpasser II are built with high quality components using Micrometals toroid cores and low-dissipation, high-Q TDK capacitors. All shunt (parallel) nodes are built with 2KV and 3KV capacitors while the series node uses 1KV, 2KV and 3KV capacitors. While these filters are rugged, you should be aware of problems that can arise when operating the unit into a high SWR which can cause unexpected high RF voltages, even at 100 watts. Also, the filters are designed for 50 ohms and a large departure from the design impedance can change the filter response and you may not achieve optimal band to band rejection. Be aware that the tuners built into many radios will not correct any high SWR presented to the Bandpasser II. If you must operate into high SWR loads you should use an external tuner connected between the Bandpasser and your antenna or antenna switch. Most amplifiers have a reasonable match on the input and should not normally present any problems.
The Bandpasser is packaged in a heavy duty (0.080 wall) anodized aluminum
case. Front and rear panels are laser engraved so the lettering will not
wear off with use. RF connectors have teflon insulation and gold plated
center pins. Power requirements are 12-14 vdc at 100ma.
Shown below are typical performance plot of the filters. Solid vertical lines mark band edges.
| 160M |
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| 80M |
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| 40M |
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| 20M |
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| 15M |
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| 10M |
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